Spectroscopic characterization of nine binary star systems as well as HIP 107136 and HIP 107533. Issue 1 (27th February 2020)

• Record Type: Journal Article
• Authors: Heyne, T.; Mugrauer, M.; Bischoff, R.; Wagner, D.; Hoffmann, S.; Lux, O.; Munz, V.; Geymeier, M.; Neuhäuser, R.
• Is Part Of: Astronomische Nachrichten. Volume 341:Issue 1(2020)
• Page Start: 99
• Page End: 117
• Publication Date: 2020-02-27
• Subjects: binaries: spectroscopic – stars: individual – HIP 107162 – HIP 23040 – HIP 2225 – HIP 30247 – HIP 113048 – HIP 25048 – HIP 85829 – HIP 77986 – HIP 98194 – HIP 107136 – HIP 107533; Astronomy -- Periodicals; 520.5
• DOI: 10.1002/asna.202013683
• Languages: English
• ISSNs: 0004-6337

Abstract

Abstract: We present the results of our second radial velocity (RV) monitoring campaign, carried out with the Échelle spectrograph FLECHAS at the University Observatory Jena in the course of the Großschwabhausen binary survey between December 2016 and June 2018. The aim of this project is to obtain precise RV measurements for spectroscopic binary stars in order to redetermine, verify, improve, and constrain their Keplerian orbital solutions. In this paper, we describe the observations, data reduction, and analysis and present the results of this project. In total, we have taken 721 RV measurements of 11 stars and derived well‐determined orbital solutions for nine systems (seven single‐ and two double‐lined spectroscopic binaries) with periods in the range between 2 and 70 days. In addition, we could rule out the orbital solutions for the previously classified spectroscopic binary systems HIP 107136 and HIP 107533, whose radial velocities are found to be constant on the km s −1 ‐level over a span of time of more than 500 days. In the case of HIP 2225, a significant change of its systematic velocity is detected between our individual observing epochs, indicating the presence of an additional companion, which is located on a wider orbit in this system.